Tariffs create near-term uncertainty for the US budget
A key risk around the US fiscal outlook – and, for that matter, the fiscal outlooks of all advanced economies - relates to the pressure for more defence spending, although in the US there is also some near-term uncertainty around tariff revenue.
As is well known, the US faces a challenging fiscal outlook, with federal debt held by the public forecast by the CBO to increase from 99% of GDP to 118% over the next ten years, exceeding the all-time peak of 106% reached in the final year of World War 2.
Rising public debt reflects average budget deficits of 6.0% of GDP over the period, up from last financial year’s outcome of 5.7% of GDP.
The monthly estimates are exceptionally volatile, but the US deficit is currently tracking a little above this trajectory, at an estimated 6.2% of GDP in May in smoothed terms, and there is some near-term pressure from tariff revenue coming in below forecasts.
Tariffs are important to the US budget because they are expected to raise an average of 0.9% of GDP per annum, paying for most of the government’s income tax cuts that are worth 1.2% of GDP, with cuts to health and welfare worth 0.4% of GDP making up the rest.
However, tariff revenue is currently about 10% below the CBO’s forecast profile, or about 0.2% of GDP, which, if sustained, would see public debt end up slightly higher at 119% of GDP after ten years.
The effective tariff rate – which is the ratio of tariff revenue to the value of imports – peaked at about 11% last year and is currently 8%, although net of refunds the figure is temporarily zero.
This is the highest effective tariff rate since World War 2, but is much lower than the 19-22% estimated rates based on announced tariffs. This divergence reflects exemptions granted by the White House, US importers switching to cheaper goods, and China looking to have rerouted some sales to the US through lower-tariff countries.
Refunds – which are usually small – matched revenue in May and should continue to do the same for some months. This is because the government has been ordered repay importers almost $0.2 trillion (0.1% of GDP) after the Supreme Court struck down most of last year’s tariffs, agreeing with the earlier ruling by the Federal Court of International Trade that the duties were illegal (note that some narrowly-based tariffs were unaffected).
Although the White House immediately imposed a temporary replacement tariff at a flat rate of 10%, the effective tariff rate is likely to remain slightly below 10% given ongoing exemptions. Moreover, the temporary tariff – which has also been ruled as illegal by the Federal Court of Trade – will ultimately have to be replaced with better formulated alternatives when it expires later this month, while the window for legislating lasting tariffs is narrowing if betting markets and polls are correct in pointing to the Republicans losing control of the House in the November mid-term elections.
All this suggest that the uncertainty around tariff revenue creates some additional uncertainty around the fiscal outlook, where a historically large budget deficit and rising public debt have placed upward pressure on government bond yields via higher expected short rates and the term premium.
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